Different acclimatization mechanisms of two grass pea cultivars to osmotic stress in in vitro culture

Piwowarczyk, Barbara; Tokarz, Krzysztof; Makowski, Wojciech; Łukasiewicz, Aneta

doi:10.1007/s11738-017-2389-6

Cited by 19 publications

(20 citation statements)

References 24 publications

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“…While shoot herbivory is often the selective force for agricultural domestication, root defence compounds are important to consider as determinants of root strength and resistance to herbivores. Decreases in root phenolic concentrations, for example, have the potential to increase root herbivore load and limit aboveground plant performance, strength and folivore resistance (War et al 2012) Moreover, aboveground herbivory has been shown to alter root phenolic concentrations, which may further interact with changes in water availability (Erb et al 2015;Piwowarczyk et al 2017). Water stress in general decreased phenolic concentrations in ancestral plants but had no effect on domesticated plants.…”

Section: Responses Of Microlaena Stipoides To Water Stress and Its Inmentioning

confidence: 99%

Root responses to domestication, precipitation and silicification: weeping meadow grass simplifies and alters toughness

et al. 2018

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Background and Aims Plant breeding usually focuses on conspicuous above-ground plant traits, yet roots fundamentally underpin plant fitness. Roots show phenotypic plasticity in response to soil conditions but it is unclear whether domesticated plants respond like their ancestors. We aimed to determine how root traits differed between ancestral and domesticated types of a meadow grass (Microlaena stipoides) under altered regimes of precipitation and soil silicon availability. Methods We subjected the two grass types to three simulated precipitation regimes (ambient, +50%/deluge and −50%/drought) in soil with (Si+) and without (Si−) silicon supplementation and then characterised root biomass, architectural complexity and toughness in addition to shoot traits. Results Domestication increased root tissue density, decreased specific root length (SRL) and decreased root architectural complexity. Domestication also increased root strength under Si− conditions but not Si+ conditions. Fine roots, SRL, architectural complexity and the force required to tear the roots all decreased under deluge. The ancestral and domesticated grasses responded similarly to precipitation, except that the latter had weaker roots (decreased fracture strain) under drought. Conclusions Domestication and increased precipitation caused changes in M. stipoides root traits that could be beneficial against some stresses (e.g. soil compaction, herbivory) but not others (e.g. drought).

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Section: Responses Of Microlaena Stipoides To Water Stress and Its Inmentioning

confidence: 99%

Root responses to domestication, precipitation and silicification: weeping meadow grass simplifies and alters toughness

et al. 2018

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“…Stresses induce production of reactive oxygen species (ROS) including singlet oxygen ( 1 O 2 ), hydrogen peroxide (H 2 O 2 ), superoxide radicals (O 2 − ) and hydroxyl radicals (OH − ), and these ROS are removed efficiently by different antioxidants at cellular level (Gills and Tuteja 2010). Under stressful environment like osmotic stress, overproduction of these toxic ROS and their reaction products cause oxidative damage to macromolecules like lipids, proteins, nucleic acids, chlorophyll and protein content of the cell (Piwowarczyk et al 2017). Membrane damage through lipid peroxidation is the most prominent impact of oxidative stress which is measured by malondialdehyde (MDA) content, as one of its end products.…”

Section: Introductionmentioning

confidence: 99%

“…Non-enzymatic components include ascorbate (AsA) and glutathione (GSH) as well as tocopherol, carotenoids and phenolic compounds (Gills and Tuteja 2010). Cellular antioxidant (both enzymatic and non-enzymatic) systems actively participate in the removal of ROS for stress tolerance including water stress (Piwowarczyk et al 2017). Roles of antioxidants like SOD, POD and CAT have been well documented in plants under drought (Devi et al 2012;Khan et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Physiological and antioxidative responses associated with drought tolerance of Lasiurus sindicus Henr. endemic to Thar desert, India

2020

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Sewan (Lasiurus sindicus Henr.) is an endemic fodder grass of low rainfall sandy habitat of hot Indian Thar desert. To understand drought responses and tolerance mechanism in Lasiurus sindicus, seedling growth, root cell viability, changes in enzymatic antioxidants and oxidative injury were assayed at early stage of seedlings in polyethylene glycol (PEG) 6000 (5, 10 and 20%)-induced drought stress. The reduction of seed germination, seedling growth, relative water content and vigor index was found with high level of PEG (10-20%), while 5% PEG slightly increased the germination and the growth parameters. A decline in pigments (Chl a, Chl b, total Chl, carotenoids), chlorophyll stability index, membrane stability index and protein content was observed, which was correlated with increased level of malondialdehyde, an indicator of excess reactive oxygen species. Results showed that increasing level of PEG activated the antioxidative enzymes, superoxide dismutase, peroxidase and catalase. Non-enzymatic antioxidants (ascorbate, phenols) and accumulation of cytosolutes (proline and sugar) for regulation of growth, osmotic potential and reactive oxygen species in drought tolerance. Overall results showed that seeds have adaptive mechanisms for germination and growth under lower level of drought, while increasing drought stress reduced growth potential of L. sindicus. It exhibited drought tolerance features, enhancement in activity of antioxidative enzyme and cytosolutes accumulation which involved in regulation of oxidative damage and osmotic adjustment for survival of the seedlings. Furthermore, our results provide important information about the physiological and antioxidative responses of the seedlings and mechanism associated with drought tolerance of L. sindicus.

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“…Grass pea (Lathyrus sativus L.) is a legume species resistant to harsh growing conditions, such as drought, salinity or periodic flooding (Piwowarczyk et al 2014(Piwowarczyk et al , 2016(Piwowarczyk et al , 2017. Due to the advantageous composition of seeds, high level (approx.…”

Section: Introductionmentioning

confidence: 99%

Response of grass pea (Lathyrus sativus L.) photosynthetic apparatus to short-term intensive UV-A:red radiation

et al. 2019

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Plants growing under natural conditions are constantly exposed to ultraviolet (UV), primarily UV-A, radiation. Grass pea (Lathyrus sativus L.) is a legume species resistant to harsh growing conditions, such as drought, salinity or periodic flooding. Due to the advantageous composition of seeds, it is used for consumption in such regions as South Asia or East Africa where high intensity of UV radiation occurs. Absorption of this spectral range causes changes in the photosynthetic apparatus of plants, including damage to the photosystem II (PSII) reaction centres. The aim of the work was to examine whether the use of the combination UV-A: red light as a source of radiation would enable quick acclimatization of the photosynthetic apparatus of grass pea to the negative effect of UV-A radiation. 14-day-old plants were exposed to UV-A:red radiation for 48 h. The plants exposed to UV-A:red radiation showed enhanced effective efficiency of PSII and increased total electron carriers, which enabled more effective photosynthesis at higher values of radiation intensity in comparison with control plants, kept under white LED light. At the same time, there were no statistically significant differences in both the photosynthetic pigment contents and the level of lipid peroxidation. The obtained results indicate that the observed increase in the efficiency of CO 2 carboxylation after short-term UV-A:red radiation has resulted from the efficient linear electron transport due to maintaining the effective oxygen evolving complex (OEC) and increased total electron carriers.

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Different acclimatization mechanisms of two grass pea cultivars to osmotic stress in in vitro culture

Cited by 19 publications

References 24 publications

Root responses to domestication, precipitation and silicification: weeping meadow grass simplifies and alters toughness

Root responses to domestication, precipitation and silicification: weeping meadow grass simplifies and alters toughness

Physiological and antioxidative responses associated with drought tolerance of Lasiurus sindicus Henr. endemic to Thar desert, India

Response of grass pea (Lathyrus sativus L.) photosynthetic apparatus to short-term intensive UV-A:red radiation

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